Commit | Line | Data |
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b865d985 JB |
1 | const { expect } = require('expect') |
2 | const { Queue } = require('../lib/queue') | |
3 | ||
4 | describe('Queue test suite', () => { | |
5 | it('Verify enqueue() behavior', () => { | |
6 | const queue = new Queue() | |
7 | let rtSize = queue.enqueue(1) | |
8 | expect(queue.size).toBe(1) | |
9 | expect(rtSize).toBe(queue.size) | |
10 | expect(queue.head).toBe(0) | |
11 | expect(queue.tail).toBe(1) | |
12 | expect(queue.items).toStrictEqual({ 0: 1 }) | |
13 | rtSize = queue.enqueue(2) | |
14 | expect(queue.size).toBe(2) | |
15 | expect(rtSize).toBe(queue.size) | |
16 | expect(queue.head).toBe(0) | |
17 | expect(queue.tail).toBe(2) | |
18 | expect(queue.items).toStrictEqual({ 0: 1, 1: 2 }) | |
19 | rtSize = queue.enqueue(3) | |
20 | expect(queue.size).toBe(3) | |
21 | expect(rtSize).toBe(queue.size) | |
22 | expect(queue.head).toBe(0) | |
23 | expect(queue.tail).toBe(3) | |
24 | expect(queue.items).toStrictEqual({ 0: 1, 1: 2, 2: 3 }) | |
25 | }) | |
26 | ||
27 | it('Verify dequeue() behavior', () => { | |
28 | const queue = new Queue() | |
29 | queue.enqueue(1) | |
30 | queue.enqueue(2) | |
31 | queue.enqueue(3) | |
32 | let rtItem = queue.dequeue() | |
33 | expect(queue.size).toBe(2) | |
34 | expect(rtItem).toBe(1) | |
35 | expect(queue.head).toBe(1) | |
36 | expect(queue.tail).toBe(3) | |
37 | expect(queue.items).toStrictEqual({ 1: 2, 2: 3 }) | |
38 | rtItem = queue.dequeue() | |
39 | expect(queue.size).toBe(1) | |
40 | expect(rtItem).toBe(2) | |
41 | expect(queue.head).toBe(2) | |
42 | expect(queue.tail).toBe(3) | |
43 | expect(queue.items).toStrictEqual({ 2: 3 }) | |
44 | rtItem = queue.dequeue() | |
45 | expect(queue.size).toBe(0) | |
46 | expect(rtItem).toBe(3) | |
47 | expect(queue.head).toBe(0) | |
48 | expect(queue.tail).toBe(0) | |
49 | expect(queue.items).toStrictEqual({}) | |
50 | }) | |
51 | }) |